francisco. and we're here in san francisco because san francisco is one of the most innovative cities in the galaxy, and it's a very great place to be the home of the challenge america summit, the first-ever challenge america summit. so it's now my job to introduce our first speaker of the night, who is going to officially kick off the first-ever challenge america summit, somebody who has been verylfe instrumental in creating a movement around innovation in san francisco. just a few months ago, announced october as innovation month inla whole lot of work on, you know, creating a@g real ecosystem for entrepreneurs, for governments, for everybody to create new ideas and new innovations. please join me in welcoming mayor ed lee to the floor. >> [applause.] >> thank you. thank you, josh. welcome, everybody. now that i know where i'm at, i want to welcome all of you, i want to of course thank the night challenge -- night rover challenge, nasa, of course, for being here. i also want to thank s.p.u.r. again for hosting it. you know, when i started working with s.p.u.r. many years ago, i knew